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ilwrrap STATES araw'r tries,

GEORGE V. DEIlUE, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF ANDEDWIN J. LLOYD, OF SAME PLACE.

AUTOMATIC GATE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 265,220, datedSeptember 26, 1882.

Application filed June 21,1882. (N0 model.)

To all whom it may concern:

Be it known that I, GEORGE V. DELUE, a subject of the Queen of GreatBritain, residing at Boston, in the county of Suffolk and State ofMassachusetts, have invented certain 11nprovements in Automatic Gatesfor Elevators, of which the followingis a full, clear, and exactdescription, reference being had to the accompanying drawings, making apart of this specification, in which- Figure l is a perspective view ofmy automatic gate and its operative mechanism applied to anelevator-well and its car. Fig.2 is a vertical section through the same.Fig. 3 is a perspective view (enlarged) of a portion of the gate and itsoperative mechanism.

My invention relates to an improvement in automatic gates for elevators,and has for its object to simplify the construction of the mechanism foroperating the gate, thus reducing its cost, and at the same timerendering it more reliable in its action and less liable to get out oforder, and my invention consistsin a novel combination and arrangementofparts, as hereinafter set forth and specifically claimed.

In the said drawings, A A represent the walls of an elevator-well, and Bthe elevatorcar, operated in the usual manner by means of the rope C. Ateach floor the opening or entrance to the elevator-well is protected bya gate, D, composed of two horizontal bars, a I),

connected together by vertical slats or bars 0,

pivoted at the top and bottom to the bars a 1). One end of the upperbar, a, of the gate is firmly secured to a short shaft, d, the ends ofwhich have their hearings in the two plates 0 fofa supporting frame orcasing, E, while the lower bar, I), is merely pivoted at g to the plate0, and thus as the gate is raised in a vertical plane by mechanism to bepresently described the bars a I) will approach each other, as seen inFig. 2, causing the gate to occupy less space than when shut down.

To the shaft d is secured agear, h, which engages with a similar gear,15, keyed to a short shaft, it, also having its bearings in the twoplates 6 f, these two gears being arranged in different vertical planes,so as to slightly overwhich causes their teeth to enother only near theedges of lap each other, gage with each I l l g their entire widthf twoshort racks or series of 5 5 i, by which construction and arrangement asthe car B is raised and just before it reaches the level of the floor Hthe rack Z will engage with and rotate the gear h, which thus causes thegate to be swung up out of the way, as

seen in Fig. 2, and should the car then descend without first goinghigher the rack i will at once rotate the gear h in the oppositedirection and instantly lower the gate. If, however, the car goesfarther up ward, the other rack, m, gear, 2', which then revolves thegear h in the proper direction to lower the gate. On the descent of thecar, just before it reaches the level of the floor H, the rack m firstengages with and rotates th turn revolves the other gear, It, in theproper direction to raise the gate, which is immediate] y lowered on thefarther descent of the car below the floor H by the rack long-aging withand rotating the other gear, h, ploying two racks or sets ofprojections, Z on, arranged in different vertical planes, each adaptedto operate one only of a pair of gears engaging with each other, thegate D is opwillengage with and rotate the lower 0 lower gear, 1', whichin and by thus emerated automatically in aperfectly certain and so as toopen just before the car reaches the level of the floor and shut downimmediately or soon after the carleaves it, whether the car is going upor down, and in this manner a against accidents, which are liable tooccur where a chain or bar is used, which requires to be operated byhand, and which, through neglect or carelessness, is often forgotten,and the entrance to the ele guarded.

It will be seen that the above-described automatic mechanism has veryfew parts, and is very strong, simple, and durable, not liable to getout of order,

reliable manner,

perfect protection is afforded o vator-well thus left un- 5 find is atall times perfectly 10o access certain and reliable in itsaction-advantages which recommend it for use wherever elevators areemployed, especially those used for carry ing freight or merehandise.Furthermoreflhe gears h i and their supporting frame or casing E arevery compact and can be readily setinto the wall of the elevator-wellout of the way, and at the same time are in aposition easily aecessihlcfor repairs.

Instead ota gate composed of bars and slats adapted to shut together, asdescribed, a gate of ditt'erent construction or a single bar adapted tobe swung up and down in a vertical plane may be used, it preferred, thegate or bar being secured to 'and actuated by the shaft (1 or gear 7b inthe same manner as the gate D, and when the gate or bar is shut down itis preferably made to drop into a catch or socket, a, which stift'ens itand holds it firmly against any inward pressure.

I. am aware or the United States Letters Patent granted to John F.Newhall, August 12, 1879, No. 218,395; but the mechanism therein shownand described is much more complicated and expensive and occupies muchmore space than my device. I therefore lay no claim to any of themechanism described in said patent.

\Vhat 1 claim as myinventioinand desire to secure by Letters Patent, is-

l l l l 1. The shafts (L It, with their gears h i arranged in dili'erentvertical planes, and adapted to engage with each other along a portiononly or the width of their teeth,in combination with the gate D, securedto the shaft (1 or gear h, and two series of racks or projections, lm,on the elevator ear or platform, arranged in different vertical planes,so that each rack or series of projections will engage with and operateone only of the gears hi, all constructed and arranged to operatesubstantially in the manner and for the purpose set forth.

2. The combination, with the gate D, of the two h 1', arranged indifferent vertical planes, and adapted to engage with each other along aportion only of the width of their teeth, and operated alternately bytwo series of racks or projections, l m, secured to the ele vator car orplatform and arranged in dilt'erent vertical planes, substantially inthe manner and for the purpose described.

VJitness my hand this 19th day of June, A. I).

GEORGE V. DELUF.

In presence of- P. E, TESGIIEMACIIER,

W J. CAMBRIDGE.

